Stand-pipe.



PATENTED FEB. 4, 1908.

J. HENDERSON.

STAND PIPE.

APPLICATION FILED Nov. 12. 1906.

all/fffll/ll lnv a a messes ms uumus rsn'xs ca, WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

JAMES HENDERSON, OF THREE RIVERS, MICHIGAN, ASSIGNOR TO SHEFFIELD CARCOMPANY, OF THREE RIVERS, MICHIGAN.

STAND-PIPE Specification of Letters Patent.

Patented Feb. 4, 1908.

To all whom it may concern:

Be it known that I, JAMES llENiJERsON, a citizen of the United States,residing at the city of Three Rivers, county of St. Joseph,

and State of Michigan, have invented certain new and useful Improvementsin Stand- Pipes, of which the following is a specification.

This invention relates to an improved hydraulic valve mechanism forcontrolling the water mains delivering to water cranes or hydrants.

The objects of the invention. are, first, to provide an improvedconstruction ol valve opening and closing means. Second, to provide insuch a valve mechanism an improved cushioning mechanism to take care ofthe water-hammer which may be occasioned by sudden variation in pressurein the main, as by the quick closing of the valve, or other means.

Objects relating to structural details will definitely appear from thedetailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is fully illustratedin the accompanying drawing, forming a part of this specification, inwhich, the single figure shows the complete valve mechanism and itsactuating means, certain portions being broken away, and other partsbeing shown in longitudinal section so that the details of theconstruction may be readily understood.

Referring to the lettered parts of the drawing, the base A supports theremaining part of my improved valve mechanism. The 'main casing A isformed integral therewith. A flange connection A is provided to connectto the water main. A dome-shaped. head A is secured to the opposite endclosing the same. On the top of the casing is provided a flangeconnection for the support of the vertical pipe of a water crane orhydrant A which is revolubly supported thereon by a turn-table mechanismconsisting of cross arms with a bearing center and surrounding flangebolted to the top flange of the casing A with a suitable gasket meansunderneath.

A pair of connecting levers l B are connected for actuating theauxiliary valve mechanism for the control of the main valve. The lever Bis supported. on a. bracket B and is bifurcated and engages an annulargroove in the collar (1 which collar surrounds the lower end ol the pipeA and is freely movable thereon, being reciprocated up and down byconnections (0.

These various parts I have just described do not pertain specially to myinvention, except that the levers and connecting means are especiallywell adapted to my device and can be appropriately claimed in thatconnection.

Within the main casing is supported the main valve consisting ol a bodypart D and a valve lid D. The body is provided with a piston head whichreciprocatcs in the cylinder E, which is supported. within the maincasing.

A stem D serves to guide the valve onto its seat ll and supports thepiston part thereof in proper alinement with the cylinder F. Within thebody part D is a piston E with a suitable packing adapted to reciprocatewithin a cylinder bore E therein. A heavy coiled spring E holds thispiston normally outward so that it presents a cushion to resist thepressure ol a water-hammer against the same. This cylinder bore isvented at the bottom so that only the resistance of the spring isexerted against the piston.

A connecting passage G extends through the body of the cylinder to oneside of the piston bore through one of the arms of the spider head 1)which all'ords the connection for the auxiliary actuating means. Thispassage G opens inwardly and is controlled by a Hat auxiliary valve (Won the end of the tubular rod D. A collar or valve (Z surrounds thistubular rod D and is provided with a gasket to close against the Hatouter surface oi. the spider 1). An aperture (1 is through this red andopens at a point outside the spider head 1) and at such a point that itis opened and closed by the disk valve (Z. Thepassage d delivers to theoutside of the valve casing. T he capacity of the passage G iscontrolled by the cock X.

Having described. the various parts of my improved valve mechanism, Iwill now indi cate their operation. In the drawing, the valve is shownclosed. The piston head of the valve is larger than the valve lid. orcover, and the water from the water main connects beyond this pistonthrough the passage G,

1 the valve closed.

\ outside. The pressure in the water main then immediately acts upon thevalve, forcing the piston of the valve through the cylinder F,discharging the water therefrom through the passage (1 which causes thevalve to open very easily and very'readily by the pressure of the waterin the main. The water then passes up to the stand pipe for discharge.On reversing the motion, the valve stem D will be moved. inwardly. Thevalve (Z will close the discharge passage cl and will open the passage Gso that the water from the water main will then enter back of the pistonof the main valve 1), and, as the area is larger than that of the valvelid or cover, the valve will be carried over towards the right of thefigure and closed, the cylinder head being filled with water enteringthrough the passage G. If the valve closes suddenly, there occurs, ofcourse, what is known as a waterhammer, but the relief piston E, heldnormally outward by the coiled spring E, yields and absorbs the force ofthe blow by permitting the main valve D to open and remain open slightlyuntil the pressure is equalized at either end of the main valve. Thetime in which this action takes place is governed by the cock X in thepassage G. The spring E is sufiiciently strong to return the pistonagainst the normal pressure in the pipe so that the device is entirelysafe for shutting off the water within the main. The valve itself isoperated by the pressure of the water in the main, an auxiliary valve,very easily controlled from the outside, directing the force of thewater in that end. In this connection, I desire to remark that the faultwith many self-actuating valves is their tendency to make the finalclosure with a snap due to the rapidly rising pressure acting on thenon-elastic piston end of the valve and accelerating the motion of thesame in direct proportion to the rapidity of the rise in pressure. Iobviate this undesirable feature by providing an elastic piston end thatwill absorb the effects of rapid ris ing pressure against the spring,compressing the same until the total force tending to close the valve-inthe meantime the main valve remaining stationaryexceeds the forcetending to open the same, when the main valve will be gradually moved tothe closed position. In practice, there is usually a second or thirdreaction or waterram, but it is clear that my improved valve willprotect against any injurious shock from this cause by reason of-itselastic feature. As the high pressure strikes the face of the closedvalve-this pressure being greater than in the piston sideit forces themain valve open, thus discharging a small amount of water. on the pistonside of this valve, the main valve would not open. The main valve,however, opens and a certain amount of the water in the cylinder F isdisplaced into the central cylinder forcing in the central piston andcompressing the spring to such a point as to equalize the pressure, andwhen the extra force of the water-hammer recedes, the main valve againmoves to the closed position by the action of the spring and .thecentral piston regains its normal position in the cylinder.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination of a main valve casing; a valve body, one end ofwhich is provided with a valve and the opposite end with a piston, thepiston being of larger area than the valve; a suitable cylinder withinwhich said piston reciprocates there being a passage through the valvebody to a suitable aperture within the cylinder; an auxiliary valve witha tubular stem arranged to open and close the passage to the cylinder;and an auxiliary valve on the same stem for connecting the cylinder'tothe outside through the hollow valve stem; and a relief piston withinthe valve held normally in position by a resisting spring, co-acting forthe purpose specified.

2. The combination-of amain valve casing; a valve body, one end of whichis provided with a valve and the opposite end with a piston, the pistonbeing of larger area than the valve; a suitable cylinder within. whichsaid piston reciprocates there being a passage through the valve body toa suitable aperture within the cylinder; an auxiliary valve with atubular stem arranged to open and close the passage to the cylinder; andan auxiliary valve on the same stem for connecting the cylinder to theoutside through the tubular galve stem, co-acting for the purpose speci-3. The combination of a main valve casing; a valve body, one end ofwhich is provided with a valve and the opposite end with a piston, thepiston being of larger area than the valve; a suitable cylinder withinwhich said piston reciprocates there being a passage through the valvebody to a suitable aperture within the cylinder; an auxiliary valvearranged to open and close the passage to the cylinder; an auxiliaryvalve for connecting the cylinder to the outside; and a relief pistonwithin the valve held normally in position by a resisting spring,co-acting for the purpose specified.

Were it not for the elastic feature 4. The combination of a main valvecasing; a valve body, one end of which is provided with a valve and the0 posite end with a piston, the piston being of arger area than thevalve; a suitable cylinder within which said piston reciprocates therebeing a passage through the valve body to a suitable aperture within thecylinder; an auxiliary valve arranged to open and close the passage tothe cylinder; a valve stem having a passage therethrough connecting theinterior of the cylinder to the outside; and an auxiliary valve forcontrolling the passage in the valve stem leading to the outside, forthe purpose specified.

5. The combination of a main valve casing; a valve body, one end ofwhich is provided with a valve lid and the opposite end with a piston,the piston being of larger area than the valve; a suitable main cylinderwithin which the piston reciprocates; an auxiliary cylinder within thevalve body, the end thereof opening into the main cylinder by suitablepassages; an auxiliary piston within said auxiliary cylinder; a springfor holding the said auxiliary piston normally outward; and connectionsfrom the water main to the main cylinder, co-acting as specified,whereby the valve and its piston can be moved into the main cylinder andthe auxiliary piston into the auxiliary cylinder to cushion the valveand relieve the Water-hammer.

6. The combination of a main valve casing; a valve body, one end ofwhich is provided with a valve lid and the opposite end with a piston,the piston being of larger area than the valve; a suitable main cylinderwithin which the pistonreciprocates; an auxiliarycylinder, the endthereof opening into the main cylinder by suitable passages; anauxiliary piston within said auxiliary cylinder; a spring for holdingthe said auxiliary piston normally outward; and connections from thewater main to the main cylind er, co-acting as specified, whereby thevalve and its piston can be moved into the main cylinder and theauxiliary piston into the auxiliary cylinder to cushion the valve andrelieve the water-hammer.

In witness whereof, I have hereunto set my hand and seal in the presenceof two witnesses.

JAMES HENDERSON. [L. s.] Witnesses CHAS. E. LANDER, JoHN T. McVAY.

